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Karol Bartyzel

@karolbartyzel

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Senior Frontend Developer

Poland

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What I'm looking for

I am looking for a role that fosters innovation, collaboration, and growth opportunities.

I am a Senior Frontend Developer with a strong background in modernizing legacy systems and driving company-wide transformations. Currently, I lead initiatives at Codility, where I successfully separated the frontend into its own repository, enhancing the architecture of a legacy monolith. My work focuses on implementing scalable frontend patterns and best practices, ensuring a seamless user experience.

Throughout my career, I have collaborated closely with UX and backend teams to design APIs and features that meet business needs. My experience includes bootstrapping applications, mentoring team members, and overseeing frontend stack decisions. I thrive in environments that encourage innovation and teamwork, and I am passionate about delivering high-quality code and solutions.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Developer

Current

Codility

Sep 2023 - Present (1 year 11 months)

* Led the initiative to separate the frontend into its own
repository, modernizing the architecture of a legacy monolith
* Drove company-wide transformation by introducing scalable frontend patterns and best practices
* Collaborated closely with UX and backend teams on API contracts and feature design
* Contributed to and guided implementation across a 10+ person team

React TypeScript styled components Django API Design UX collaboration

Senior Frontend Developer

NFTNerds

Jun 2022 - Aug 2023 (1 year 2 months)

* Bootstrapped a greenfield application and drove architecture decisions
* Actively participated in business and technical planning
* Developed, tested, and maintained the application with code reviews

React TypeScript Material UI Architecture Business Planning Technical Planning

Frontend Developer

PwC

Dec 2020 - May 2022 (1 year 5 months)

* Designed and led implementation of new features
* Oversaw frontend stack decisions and built POCs for key libraries
* Mentored team members and supported sprint planning
* Occasionally ran scrum ceremonies

React TypeScript styled components Material UI Sprint Planning Mentoring

Frontend Developer

ESET

Sep 2018 - Nov 2020 (2 years 2 months)

* Led frontend migration from Angular to React
* Defined code style guidelines and conducted internal trainings
* Designed, developed, and maintained core application modules.